INORGANIC COMPOSITION OF SOME AMERICAN SOILS. 
types of American soils — Fusion analysis for total constituents. 
[Analyses by W. O. Robinson.] 
13 
Glacial and 
Loessial prov- 
Piedmont Plateau province. 
ince- 
Con. 
No. 13. 
No. 14. 
No. 15. 
No. 16. 
No. 17. 
No. 18. 
No. 19. 
No. 20. 
No. 21. 
No. 22. 
No. 23. 
No. 24. 
No. 25. 
No. 26. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Per ct. 
Perct. 
Per ct. 
Per ct. 
73.50 
76.86 
66.49 
44.15 
88.57 
55.69 
80.79 
69.35 
76.71 
74 .38 
84.58 
74.99 
74.33 
71.76 
.59 
.60 
1.02 
1.14 
.55 
.91 
.55 
.60 
.41 
.40 
1.51 
1.59 
1.04 
1.06 
9.10 
9.49 
17.11 
27.58 
5.76 
24.42 
10.55 
18.04 
12.85 
16.31 
5.54 
10.90 
11.00 
14.36 
4.30 
3.79 
7.43 
16.23 
1.55 
8.83 
1.61 
3.42 
2.81 
2.56 
3.30 
6.75 
4.64 
5.82 
.113 
.062 
.51 
.033 
.044 
.022 
.017 
.014 
.005 
.005 
.045 
.039 
.136 
.109 
.010 
.010 
.013 
.025 
.002 
.006 
.004 
.002 
.007 
.004 
.013 
.014 
.006 
.007 
.03 
.03 
.05 
.06 
.01 
.04 
.02 
.02 
.04 
.03 
.03 
.03 
.03 
.05 
N. T. 
N. T. 
.02 
.02 
.03 
.04 
.03 
.01 
.02 
.02 
.04 
N. T. 
N. T. 
N. T. 
.05 
.04 
.003 
.01 
.04 
.01 
.08 
.06 
.04 
.01 
.08 
.02 
.05 
.04 
N.F. 
N. F. 
N. F. 
N.F. 
N.F. 
N. F. 
P. 
N.F. 
P. 
N.F. 
N. F. 
N. F. 
N.F. 
N.F. 
N. T. 
N. T. 
.04 
.04 
.03 
Doubt. 
.04 
.03 
N. T. 
N. T. 
N. T. 
N. T. 
N. T. 
N. T. 
N. T. 
N. T. 
P. 
P. 
P. 
P. 
P. 
P. 
N. T. 
N. T. 
N. T. 
N. T. 
N. T. 
N. T. 
.94 
.93 
.36 
.44 
.39 
.40 
.89 
.72 
.08 
.21 
.21 
.26 
1.13 
1.73 
.063 
.048 
.063 
.027 
.039 
.042 
.112 
.098 
.287 
.360 
.037 
.030 
.053 
.053 
.05 
.05 
.04 
.03 
.01 
.01 
.05 
.04 
.05 
.03 
.04 
.03 
.04 
.03 
.71 
.58 
.31 
.09 
.21 
.29 
.19 
.29 
.29 
.38 
.25 
.32 
.69 
1.06 
2.03 
1.04 
.62 
.61 
.82 
1.06 
3.96 
3.34 
3.26 
4.07 
.74 
.97 
1.57 
1.50 
1.67 
1.22 
.16 
.15 
.16 
.14 
.87 
.89 
.39 
.30 
.14 
.28 
1.53 
1.54 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
P. 
.001 
.001 
Trace. 
Trace. 
.001 
.001 
.01 
.01 
.001 
.001 
.001 
.001 
.002 
.002 
N. F. 
N. F. 
N.F. 
N.F. 
N.F. 
N.F. 
N. F. 
N.F. 
N.F. 
N.F. 
N.F. 
N.F. 
N.F. 
N.F. 
.24 
.20 
.17 
.15 
.08 
.07 
.12 
.12 
.05 
.05 
.12 
.15 
.16 
.10 
.13 
.18 
.07 
.07 
.04 
.09 
.06 
.06 
.12 
.14 
.15 
.16 
.15 
.10 
7.70 
4.76 
8.06 
11. 83 
2.93 
8.94 
1.41 
4.54 
3.16 
2.80 
3.89 
4.72 
4.51 
2.83 
2.75 
2.03 
2.47 
2.90 
.53 
2.00 
.48 
1.53 
.47 
.22 
.92 
1.43 
1.72 
2.06 
4.94 
2.62 
1.26 
.27 
1.46 
.09 
.40 
.33 
1.78 
.41 
2.40 
1.04 
1.99 
1.21 
N. F. 
N. F. 
N.F. 
N.F. 
N.F. 
N.F. 
N.F. 
N. F. 
N.F. 
N.F. 
N. F. 
N.F. 
N. F. 
N.F. 
contained 11.2 per cent stones; of this amount 53 per cent was ferru- 
ginous quartz, 43 per cent quartz, 3 per cent clay nodules, and 1 per 
cent mica schist. 
(24) Louisa loam, subsoil of No. 23, depth 12 to 30 inches. This 
sample contained 20 per cent of stones. Seventy-seven per cent 
was quartz, 15 per cent ferruginous quartz, and 8 per cent clay 
nodules. 
(25) Penn silt loam, h mile west of Penn Square, Morristown, Pa. 
Depth to 9 inches. This soil belongs to the Piedmont Plateau prov- 
ince and is derived from sandstones of Triassic age. It is a light 
Indian-red mellow silt loam with a darker silty clay subsoil. The 
sample was taken from a field supporting a good stand of grass, having 
been cleared 13 years ago and since then used for corn, wheat, and 
grass in regular rotation. No commercial fertilizer has been added, 
but an application of about 5 tons of barnyard manure to the acre was 
made every three years. In general this soil is used for general farm 
crops and is considered a productive type. No stones were present 
in this sample. 
(26) Penn silt loam, subsoil of No. 25, depth 9 to 24 inches. This 
sample contained no stones. 
